Nut-wrench.



w. L. BESSOLO.

7 NUT WRENCH. v APPLICATION FILED DEC. 11, I9I3. RENEWED JULY 7, 1915.

,4 TIOHIVEVS.

Patented Oct 19, 1915.

till

i s.) Lilith J g i ny n a rift Pl nth mi ll- Specification of Letters Potent.

Application filed December 11, 1913, Serial No. 805,958. Renewed July r, 1915.

To all whom it may concern:

Be it known that 1, .WILLIAM L. Bnssono, a citizen of the United States and a resident of San Diego, in the county of Elan Diego and State of California, have invented an Improvement in 'Nut ii renches, of which the following is a specification.

My invention is an improvement in that type of nutwrenches in which both jaws are adapted to move toward and from each other to adapt them for gripping and releasing a nut or other object, and in which the jaws are moved toward each other when a pull is applied to the lever handle.

I have embodied my improvement in two closely related forms which are hereinafter described and illustrated in the accompanying drawing, in which Figure 1 is a side or plan view of the preferred form of wrench. Fig. 2 is an edge view'of the same. Figs. 3 and 4c are cross sections on the lines 33 and 4-4, respectively of Fig. 1. Fig; 5 is a longitudinal section of a portion of the wrench. Fig. 6

is a side or plan view of the modified or second form of wrench.

I will first describe the invention illustrated in Figs. 15. A lever handle 1 is pivoted at 2 in the rear end of a ll-shaped metal frame or housing 3. The head of said leverhandle is provided with two lateral arms 4 and 5 Which are respectively connected with theouter jaw 6 and inner jaw 7. The outer jaw G'has an extended shank 8 which is provided with ratchet teeth 9 point ing outward or toward the jaw. The shank 8 is adapted to slide in a slot formed in the lateral arm 4 of the handle 1, and. the ratchet teeth engage a rivet or cross-pin 10 passing through the arm 4. A bowed plate spring 11 is arranged between the jaw shank 8 and the handle 1, as shown in Fig. 1, and serves to hold the-ratchet normally engaged with the cross-pin 10. lt is apparent that by pressing inward upon the ratchet or toward the handle 1, its teeth may he disengaged from the cross-pin, so as to permit outwardadjustment of the jaw 6, The inner jaw 7 is pivoted at 12 in the inner end of the housing 3 and'projects laterally from the latter. The outer portion of the jaw is connected by a pivoted link 13 with the forwardly and laterally projecting armli of the handle 1.

It is obvious that the outer jaw 6 may he Patented @ct. filth.

eerie! No. 38,511.

easily and quickly adjusted in either direction for adapting the wrench for application to nuts or other objects dill'ering in size. It is further apparent that when the wrench has been so applied upon. pulling the lever 1 in the direction oifthe double arrow ig. 1) the result .villhe that the outer jaw (3 will be drawn backward owing to the connection hetwehn its ratchet shank and the cross-pin 10/in the arm l: of the handle. This movement is indicated by dotted lines in Fig. 1. w

The effect of the retraction of the jaw 6 is to grip the nut or other object more firmly. It will he further seen that hy the same movement of the handle I. the link 13 forces the outer end of the inner jaw 7 more firmly against the nut or other object. Thus the jaws are forced toward each other simultaneously and grip the nut more and more firmly as the pressure on the handle is increased. Upon releasing the handle, it may be moved back to the position indicated in Fig. 1, and the jaws thus separate from the nut sufiiciently to allow the wrench to he released from it.

In the form of the invention shown in Fig. 6, the shank 8 oi the outer jaw 6* is formed with a screw thread on opposite edges, and a rotary nut l i is applied there to, it being arranged in a slot formed in the back of the housing 3. it is apparent that by rotating the nut. the jaw (3 may be advanced or retracted as conditions require; that is to say, to adapt the wrench for gripping a nut or other object or releasing the same. The inner jaw 7 is not pivoted as in the former case, but adapted to slide in the housing 3 with which it is operatively connected by means of cross pins 15 that pass through slots 16 in the jaw and serve as guides for the jaw in its outward and re tractile movements. 'llheflateral arm. 4' of the handle 3. is adapted to ahut the inner end oi the housing 3.. as shown in Fig. 6.

its will he understood by reference to Figs. 2. 3, 4 and 5, the handlol is formed of three parts one of them being filling piece 1'? which is sr-xcured hy rivets 18 hetween thin parallel side pieces.

In a wrench ot the type indicated. the combination with a frame, of opposing jaws. one being provided with a ratchet shank which is slidable in the frame and the other the handle with the pivoted jaw, as depivoted in the front portion of the frame, scribed.

a handle pivoted to the rear portion of the frame and having opposed lateral arms, one WILLIAM LOUIS BESSOLO' 5 ofwhich is provided with a cross-pin engag- Witnesses:

ing the shank of the outer jaw, and a link MARY L. SAVAGE,

pivotally connecting the opposite arm of C. S. FETTE. 

